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Principals, switching functions and routing techniques in computer networks
Dvořák, Pavel ; Pelka, Tomáš (referee) ; Polívka, Michal (advisor)
This bachelor thesis consider main principles and function of active network components. Mainly is intent to component working on the third level of referential model ISO/OSI, router. There are described its main parts and more closely charactered routing protocols. Then is verified the ability of dynamic routing to react to failure in the network and there is measured the reaction time of crossing to secondary route when using different routing protocols. Another part of the thesis is focused on the questions of Quality of Service (QoS) and its support in computer networks. There are explored various ways of the QoS configuration on the routers and the proper of them is chosen and applied to the test network.
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Audio amplifier controlled by the IP protocol
Dvořák, Petr ; Schimmel, Jiří (referee) ; Kouřil, Jiří (advisor)
The bachelor thesis is intent on projection and realization of a device whitch is capable of communicate with a remote client through the Ethernet making use of the protocol set TCP/IP. This communication will be used for the control of analog and digital outputs of the device, which is able to be attached to any amplifier of audio signals. One of used protocols is UDP. This protocol is closely described, because it is used for transfer of data controlling outputs. The whole device is controlled by microprocessor ATmega32, which operates the communication with the ethernet interface through the controller ENC28j60, the communication with the D/A converters MCP4922 and controlling of digital outputs and a display. The device has its own IP and MAC address for identification in the network. It is possible to edit both addresses in the menu of the device with the help of the module LCD, the display of 2x16 characters with fours buttons. The audio amplifier staffed by the voltage controlled by the computing amplifiers SSM2018T is connected to this device. The amplifier is proposed as six-channel with symmetric inputs through the connectors XLR and unsymmetric outputs through the connectors CINCH. The operating programme which is able to be run on PC with the operating system Windows is necessary for the remote control of the device in the network and all functions of the device are controlled by this programme. This programme enables to control the device after setting the IP address of the destination device and the communication establishment. The motherboard is proposed as a universal module which keeps at disposal up to 6 analog outputs with the range of the control voltage 0 – 5 V and up to 21 binary inputs/outputs.
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Drainage circular machine
Dvořák, Pavel ; Mana, Jaroslav (referee) ; Kašpárek, Jaroslav (advisor)
This thesis deals with a design of a circular draining machine. The aim is to design a machine that complies with the respective requirements. The machine is assembled in a line for the preparation of paper stock, which is further processed for final paper production.
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Optimization of single slotted flap
Dvořák, Petr ; Šošovička, Róbert (referee) ; Popela, Robert (advisor)
The main objective of this diploma thesis is to optimize the high lift device on the wing of the Phoenix Air U-15 ultralight aircraft, so that it complies with the UL-2 regulation regarding the stalling speed – 65 KPH. This is fulfilled by optimization of the slotted flap position. Methods used include the Response Surface Method and the Computational Fluid Dynamics approach – namely Ansys Fluent v6 software package. Furthermore, the paper deals with take-off flap optimization and construction of the flap deflection mechanism.
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Negative Influences of Spindle Vibrations
Dvořák, Pavel ; Huml, Jan (referee) ; Havlíková, Marie (advisor)
This bachelor’s thesis deals with the vibration measuring of the spindle no.1 of the machine tool STRATOS. The vibrations have a fundamental impact both on the machining process and on the observance of a prescribed tolerance. This thesis also treats the accelerometers function principles, namely of the piezoelectric and piezoresistive ones. The aim of the research is to collect the data needed for the proposition of a suitable monitoring mechanism which will monitor the condition of the machining spindle. The thesis also includes a prototypal protocol about the measuring procedure, its achieved results, and graphs. The issue analysis is conceived to the effect that it is applicable for the realization of the monitoring mechanism which will be part of the process and will show the actual state and the condition of the spindle.
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Supercapacitor cycling device
Hába, Roman ; Kunovjánek, Miroslav (referee) ; Dvořák, Petr (advisor)
The supercapacitor is a perspective electrical component reaching very large capacity. Currently is beeing worked on improving its parameters. These parameters are needed to test. Charging and discharging of the supercapacitor is theoretically fully reversible process. However, real supercapacitor accompanies ageing of the electrolyte and electrodes, lead to reduction of the capacity. The aim of this work is to design a device that expose supercapacitor to accelerated ageing, which will facilitate the assessment of ageing commercial and laboratory made supercapacitors.
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University Residential Centre
Dvořák, Petr ; Sláma, Ludvík (referee) ; Mohelníková, Jitka (advisor)
University Residential Centre is the theme of this Master's thesis. The aim was to create a building, which will provide comfortable living and learning to students. The building has three floors - there are student apartments for one to four people in the upper two floors. The ground floor is dedicated to educational purposes. It contains a library and two lecture halls. From the constructional point of view, the structural system is a reinforced concrete skeleton. Main vertical elements are columns and main horizontal are two-way reinforced slabs. Utilization of glass facade and innovative type of thermal insulation can be found interesting.
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The equipment of social care at Svitavy – building technology design
Dvořák, Petr ; Hrůza,, Jaroslav (referee) ; Hrazdil, Václav (advisor)
Diploma thesis deals with a building technological project – Social care Institucion in Svitavy. It is about a new building of retimerent home with ground plan creating a letter „ U“. The building is dilated into 3 parts: Unit „A“,Unit „B“, Unit „C“. The aim of diploma thesis is construction desing which covers site facilities technological standart, inspecting and testing plan, time and finenciel plan.A part of thesis is also specializacion in thermal protection cres.
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IPv6 Protocol Implementation Concept in Company
Dvořák, Petr ; Dolníček, Petr (referee) ; Ondrák, Viktor (advisor)
Diploma thesis is focused on IPv6 protocol implementation in real company´s enviroment. In the beginning we are introduced with theoretical knowledge about this protocol. After analysis of current state of XXX spol s r.o. we can use this knowledge in practical part of thesis for proposal of possible solutions including physical devices.
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